@baramasala:
Hmm in that case I think it's quarter. If only one grandparent is Japanese, then it's quarter.

If each parent was half Japanese... then maybe you could call that a third? There would be three ethnicities buuut then it would be more than a third since he would be made up of two parts Japanese and one part Chinese and one part other so then he would be half Japanese again and now I'm confusing everyone. I think the lab experiment was more simple.

@NorthernJin: OMFG I died at that comment, but yeah actually I think I might've meant a quarter?? Hideki's technically mixed by three ethnicities (His dad is mixed Japanese/Chinese and his mother is fully something else) so I'm not sure if that'd be a quarter or a third or...gosh I'm so bad at fractions XDDD

@baramasala: 我也高学学习中文 but my college doesn't have any chinese classes besides like beginners' chinese so i placed out of it freshman year and then my knowledge of it has been gradually fading, i'd love to get back into learning it though! haha